Skip to main content
UniHealth

Doctor search

Nicholas Arger, MD

Internal Medicine · San Francisco

NPI 1952690877

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
12
2 carriers
Offices
4
Since medical school
15 years
University of Southern California Keck School of Medicine, 2011

Offices

4 locations · UCSF Medical Group Business Services · University Anesthesia Medical Group · University of California San Francisco · Permanente Medical Group Inc

Looking this up.

Hospitals listed: UCSF Medical Center. That is not proof they admit you there this week.

Plans that list them

12 plans · 2 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Arger’s office to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

12 of 12 plans

Plans whose provider directory lists this clinician
Alignment Health BreathEasy (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Clarity (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Harmony (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes CalPlus (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes Care (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Heart & Diabetes Choice (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Honor+ Plan (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health My Choice CalCare (HMO)Alignment Health PlanListedOct 3, 2026
Imperial Courage Plan (HMO)Imperial Health Plan of California, Inc.ListedSep 1, 2026
Imperial Dynamic Plan (HMO)Imperial Health Plan of California, Inc.ListedSep 1, 2026
Imperial Senior Value (HMO C-SNP)Imperial Health Plan of California, Inc.ListedSep 1, 2026

California Medical Board record

Licence A131346 · Current

Licensed to practise in California · since 2014 · expires 2028-03-31 · University of Southern California Keck School of Medicine.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

School, training and certification

What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.

Specialty certification

  • American Board of Internal Medicine - Critical Care Medicine
  • American Board of Internal Medicine - Internal Medicine
  • American Board of Internal Medicine - Pulmonary Disease

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
74.5 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Hospitals they work in

1 hospital

These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.

  • UCSF Medical CenterSan Francisco, CAAcute Care Hospital · Voluntary non-profit - Other · Has an emergency department · Birthing-friendlyPart of University of California Health, which runs 12 hospitalsHome of UCSF Helen Diller Family Comprehensive Cancer Center, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 81% would definitely recommend it
    Overall rating: 4 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 4.9 (3.79 to 6.02) · 7,590 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 12.8 (11.3 to 14.4) · 2,019 cases, Jan 2024 – Dec 2024Better than the national rate — Death rate among surgical inpatients with serious treatable complications: 139.4 (110.22 to 168.58) · 452 cases, Jul 2022 – Jun 2024Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.622, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.626, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.491, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.8 (0.7 to 1) · 2,336 cases, Jan 2024 – Dec 2024
See every measure and the patient survey for UCSF Medical Center

Behind the star rating — Deaths: 5 better, 3 the same, 0 worse of 8 measures. Safety: 3 better, 5 the same, 0 worse of 8 measures. Readmissions: 3 better, 5 the same, 3 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

Every scored measure at UCSF Medical Center
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths4.9 (3.79 to 6.02) · 7,590 casesWorseJul 2022 – Jun 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits12.8 (11.3 to 14.4) · 2,019 casesWorseJan 2024 – Dec 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths139.4 (110.22 to 168.58) · 452 casesBetterJul 2022 – Jun 2024
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.622BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.626BetterOct 2024 – Sep 2025
MRSA BacteremiaInfections0.491BetterOct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.8 (0.7 to 1) · 2,336 casesBetterJan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.24 (0.58 to 1.9) · 4,689 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths1.05 (0.89 to 1.2)No differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.9 · 89 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths7.5 · 85 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths10.1 · 132 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths6.6 · 454 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 618 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths9.6 · 380 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.7 · 5,000 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.22 (0.06 to 0.38) · 15,965 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.2 (0.05 to 0.35) · 17,859 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths0.85 (0 to 1.83) · 4,184 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2 (1.1 to 2.9) · 6,516 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths7.35 (4.49 to 10.21) · 3,989 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5 (3.22 to 6.77) · 4,087 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.95 (0.74 to 3.15) · 2,034 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.95 (0.63 to 1.28) · 15,431 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths4 · 399 casesNoneApr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.899No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections0.689No differentOct 2024 – Sep 2025
SSI - Colon SurgeryInfections1.224No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits16 · 156 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20 · 564 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits60.3 · 160 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-9.7 · 550 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits44.1 · 660 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.8 · 667 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.7 (4.8 to 6.7) · 2,019 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits6 · 421 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits10.5 · 53 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits20 · 107 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits13.9 (11.3 to 17.1) · 3,247 casesNo differentJan 2022 – Dec 2024

What patients said (3,181 patients answered, 25% of those asked)

Patient survey stars by topic at UCSF Medical Center
Cleanliness4
Nurse communication4
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating4
Quietness2
Recommend hospital5
Share of patients giving the best answer at UCSF Medical Center
Room was "always" clean71%
Nurses "always" communicated well80%
Doctors "always" communicated well80%
Staff "always" explained61%
Yes, staff "did" give patients this information88%
Yes, staff "did" give patients information about help after discharge87%
Doctors "always" explained things so they could understand74%
Doctors "always" listened carefully78%
Doctors "always" treated them with courtesy and respect86%
Patients who gave a rating of "9" or "10" (high)76%
Staff "always" explained new medications75%
Nurses "always" explained things so they could understand77%
Nurses "always" listened carefully78%
Nurses "always" treated them with courtesy and respect86%
"Always" quiet at night50%
"YES", patients would definitely recommend the hospital81%
Staff "always" explained possible side effects46%
Yes, staff "did" give patients information about possible symptoms90%

Original Medicare doctor bills

$19,882

Medicare paid this office $19,882 for 102 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Largest Original Medicare bills
Critical care, first 30-74 minutes19$6,648$185
Long return visit (40+ min)37$5,774$123
New patient visit (60+ min)11$1,774$161
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes11$1,275$116
Insertion of artery tube for blood sampling or infusion through skin14$523$37
See all 6 services
Every Original Medicare service billed
Critical care, first 30-74 minutes19$6,648$185
Long return visit (40+ min)37$5,774$123
New patient visit (60+ min)11$1,774$161
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes11$1,275$116
Insertion of artery tube for blood sampling or infusion through skin14$523$37
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's24$370$15

Procedures year by year

Procedures billed to Original Medicare by year
Procedure201920202021202220232024
Insertion of artery tube for blood sampling or infusion through skin––2022–14

Times billed to Original Medicare each year. A blank year means fewer than 11 people had it, or none: Medicare does not publish smaller counts. Medicare Advantage patients are not included.

Who their Medicare patients are

102 Original Medicare patients in 2024. Average age 70 · Women 55% · Also on Medicaid 39% · Health risk score 2.23. Above the middle of the specialty; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 75% · Diabetes 37% · Coronary heart disease 35% · Chronic kidney disease 34% · Depression 33% · COPD 29% · Heart failure 25% · Cancer 22% · Stroke 22% · Atrial fibrillation 19% · Dementia 11%.

The office billed $136,836, Medicare allowed $25,352 and paid $19,882; for 203 services of 16 kinds.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

Original Medicare by year
2024102203702.23$136,836$19,882
2023115206712.38$192,141$25,855
2022140338712.50$309,763$41,546
2021123253722.33$207,164$28,726
202078186702.05$144,213$21,658
201963137701.39$90,243$13,985
20183888682.35$58,904$9,027
20171112681.41$8,864$1,329

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

See the services billed each year

2023: 4 services

Original Medicare services billed in 2023
Critical care, first 30-74 minutes42$13,452$189
Long return visit (40+ min)23$3,357$124
New patient visit (60+ min)12$1,883$157
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes13$1,289$72

2022: 7 services

Original Medicare services billed in 2022
Critical care, first 30-74 minutes63$23,344$191
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes28$4,028$92
Long return visit (40+ min)21$2,980$130
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes24$1,973$64
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes13$1,153$89
Insertion of artery tube for blood sampling or infusion through skin17$841$38
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or11$481$28

2021: 6 services

Original Medicare services billed in 2021
Critical care, first 30-74 minutes49$13,911$193
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes30$3,511$90
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes36$3,040$63
Long return visit (40+ min)16$2,518$126
Critical care, each additional 30 minutes11$1,553$97
Insertion of artery tube for blood sampling or infusion through skin19$773$39

2020: 4 services

Original Medicare services billed in 2020
Critical care, first 30-74 minutes29$10,413$196
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes25$4,134$94
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes25$2,689$66
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes11$1,001$91

2019: 3 services

Original Medicare services billed in 2019
Critical care, first 30-74 minutes14$4,319$196
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes23$4,108$93
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes29$3,464$65

2018: 1 service

Original Medicare services billed in 2018
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes18$4,076$93

Drugs they prescribed that Part D paid

$15,122

Pharmacies billed $15,122 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

Opioids were 0% of their Part D prescriptions (0 of 71) in 2024. At or below the middle of the specialty; the typical internal medicine clinician is at 1%.

22 generic and 49 brand-name prescriptions · $15,122 in drug cost.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

Largest Part D drug costs
Ventolin Hfa13$723$56
Albuterol Sulfate Hfa14$463$33

Year by year

Part D prescribing by year
202471140% (0)69%$15,122
202350110% (0)58%$11,829
202227None0% (0)78%$8,394
202116None0% (0)None$3,858
202013None0% (0)None$686
201917None0% (0)82%$7,472
201422019None18%$9,455
201317127None22%$5,640

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

See the drugs prescribed each year

2023: 1 drug

Part D drugs prescribed in 2023
Albuterol Sulfate Hfa11$385$35

2019: 1 drug

Part D drugs prescribed in 2019
Spiriva Respimat12$5,559$463

2014: 5 drugs

Part D drugs prescribed in 2014
Levothyroxine16$140$9
Metformin16$97$6
Amlodipine Besylate18$87$5
Glipizide12$80$7
Lisinopril17$70$4

2013: 1 drug

Part D drugs prescribed in 2013
Lisinopril12$48$4

Professional record

NPI
1952690877
Licence
CA A131346California A131346: Current · expires 2028-03-31
Trained
University of Southern California Keck School of Medicine, 2011 · 15 years ago
Group
UCSF Medical Group Business Services · University Anesthesia Medical Group · University of California San Francisco · Permanente Medical Group Inc
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
Yes
Taxonomy
Federal specialty code 207RP1001X (207RP1001X)
Mailing address
505 Parnassus Ave, 1336m, San Francisco, CA, 94143
NPI first listed
2011-03-31
NPI last updated
2018-08-20

This is when the NPI record was last certified, not a medical board exam.